Discussion of 'The Triassic U–Pb age for the aquatic long-necked protorosaur of Guizhou, China'. (5th November 2014)

• Record Type: Journal Article
• Authors: Wang, Y. B.; Yang, D. T.; Liu, D. Y.; Han, J.; Wang, L. T.; Yao, J. X.
• Is Part Of: Geological magazine. Volume 152:Number 3(2015:May)
• Page Start: 574
• Page End: 574
• Publication Date: 2014-11-05
• Subjects: Panxian, -- reptile, -- extinction, -- recovery; Geology -- Periodicals; 551.05
• DOI: 10.1017/S0016756814000624
• Languages: English
• ISSNs: 0016-7568

Abstract

Abstract : We thank Liu Jun for his comment on our recent paper (Wang et al. 2014) and are grateful for his calling our attention to this apparent contradiction, and we welcome the opportunity to reply. Based on the sensitive high-resolution ion microscope (SHRIMP) U–Pb zircon age for a volcanic tuff bed within the upper part of the Guanling Formation, we suggested in our study that the age of the fossil horizon of the Panxian fauna is 244 ± 1.3 Ma, which is 14 Ma earlier than the previously estimated age that Li, Rieppel & LaBarbera (2004) published in Science . However, Liu Jun argued that this conclusion is confused, that there is no 14 Ma difference and that there is agreement between the biostratigraphic data and the new radiometric age.